In an information recording medium including a plurality of sector fields and having various pieces of information recorded in the sector fields, the header field in each sector field includes a first field in which a continuously repeated pattern complying with the run length limitation in the predetermined range is recorded, a second field in which an address mark including a violation pattern different from a reproduced pattern obtained by reproducing the repeated pattern when a defective pit which cannot be recognized as a pit is included in pits representing the repeated pattern is recorded, the violation pattern exceeding the run length limitation in the predetermined range, and a third field in which address data is recorded.
Legal claims defining the scope of protection, as filed with the USPTO.
1. An information recording medium including a plurality of sector fields, and having various pieces of information recorded in the sector fields, wherein the sector field comprises: a header field; and a recording field on/from which data is recorded/reproduced on the basis of data recorded in the header field, and the header field comprises: a header 1 field; a header 2 field provided following the header 1 field; a header 3 field; and a header 4 field provided following the header 3 field, each of the header 1 field, the header 2 field, the header 3 field and the header 4 field includes: (i) a continuously repeated pattern, (ii) an address mark in which a special pattern comprising an odd number of channel bits having a value of 1 repeats itself an even number of times, the address mark comprising a violation pattern exceeding a run length limitation in a predetermined range, (iii) address data complying with the run length limitation in the predetermined range, a recording position of which is indicated by the address mark, and (iv) a sector number, and the relationship in magnitude between the sector number included in each of the header 1 field and the header 2 field and the sector number included in each of the header 3 field and the header 4 field is indicative of whether said recording field is a land or a groove.
2. A cutting apparatus for recording header data, by exposure, on a master for an information recording medium on which various pieces of information are recorded, comprising: recording means for effecting recording by exposure on a header field including the header data in a plurality of sector fields, wherein the header field comprises: a header 1 field; a header 2 field provided following the header 1 field; a header 3 field; and a header 4 field provided following the header 3 field, each of the header 1 field, the header 2 field, the header 3 field and the header 4 field includes: (i) a continuously repeated pattern, (ii) an address mark in which a special pattern comprising an odd number of channel bits having a value of 1 repeats itself an even number of times, the address mark comprising a violation pattern exceeding a run length limitation in a predetermined range, (iii) address data complying with the run length limitation in the predetermined range, a recording position of which is indicated by the address mark, and (iv) a sector number, and the relationship in magnitude between the sector number included in each of the header 1 field and the header 2 field and the sector number included in each of the header 3 field and the header 4 field is indicative of whether said recording field is a land or a groove.
3. An information reproducing apparatus for reproducing information recorded on an information recording medium on which various pieces of information are recorded, comprising: address mark detection means for detecting an address mark from a header field in a plurality of sector fields; and reproducing means for reproducing address data in the header field in accordance with the address mark detected by the address mark detection means, wherein the header field comprises: a header 1 field; a header 2 field provided following the header 1 field; a header 3 field; and a header 4 field provided following the header 3 field, each of the header 1 field, the header 2 field, the header 3 field and the header 4 field includes: (i) a continuously repeated pattern, (ii) an address mark in which a special pattern comprising an odd number of channel bits having a value of 1 repeats itself an even number of times, the address mark comprising a violation pattern exceeding a run length limitation in a predetermined range, (iii) address data complying with the run length limitation in the predetermined range, a recording position of which is indicated by the address mark, and (iv) a sector number, and the relationship in magnitude between the sector number included in each of the header 1 field and the header 2 field and the sector number included in each of the header 3 field and the header 4 field is indicative of whether the recording field is a land or a groove, and the reproducing means discriminates whether the recording field is a land or a groove, based on the relationship in magnitude of values indicated by the sector numbers in the header fields, and reproduces the recording field based on a discrimination result.
4. A medium according to claim 1 , wherein each of the header 1 field, the header 2 field, the header 3 field and the header 4 field comprises: a first field in which the continuously repeated pattern is recorded, the repeated pattern complying with the run length limitation in the predetermined range, a second field in which the address mark is recorded, the address mark comprising the violation pattern different from a reproduced pattern obtained by reproducing the repeated pattern when a defective pit which cannot be recognized as a pit is included in pits representing the repeated pattern, and a third field in which the address data is recorded.
5. A medium according to claim 1 , wherein each of the header 1 field, the header 2 field, the header 3 field and the header 4 field comprises: a first field in which the continuously repeated pattern is recorded, the repeated pattern satisfying a run length m ; a second field in which the address mark comprising the violation pattern satisfying a run length n ( n>m, n rm ( r 1), r : natural number) is recorded; and a third field in which the address data is recorded.
6. A medium according to claim 1 , wherein each of the header 1 field, the header 2 field, the header 3 field and the header 4 field comprises: a first field in which the continuously repeated pattern is recorded, the repeated pattern complying with the run length limitation in the predetermined range; a second field in which the address mark is recorded, the special pattern having the repeated pattern adjacent to the violation pattern; and a third field in which the address data is recorded.
7. A medium according to claim 1 , wherein each of the header 1 field, the header 2 field, the header 3 field and the header 4 field comprises: a first field in which the continuously repeated pattern is recorded, the repeated pattern satisfying a run length m , a second field in which the address mark is recorded, the special pattern having the repeated pattern adjacent to the violation pattern satisfying a run length n ( n>m, n rm ( r 1), r : natural number); and a third field in which the address data is recorded.
8. An apparatus according to claim, 2 , wherein the recording means comprises: first recording means for recording by exposure the continuously repeated pattern, the repeated pattern complying with the run length limitation in the predetermined range; second recording means for recording, by exposure, the address mark, the address mark comprising the violation pattern different from a reproduced pattern obtained by reproducing the repeated pattern when a defective pit which cannot be recognized as a pit is included in pits representing the repeated pattern, and third recording means for recording the address data by exposure.
9. An apparatus according to claim 2 , wherein the recording means comprises: first recording means for recording by exposure the continuously repeated pattern, the pattern satisfying a run length m ; second recording means for recording, by exposure, the address mark, the address mark comprising the violation pattern satisfying a run length n ( n>m, n rm ( r 1), r : natural number); and third recording means for recording the address data by exposure.
10. An apparatus according to claim 2 , wherein the recording means comprises: first recording means for recording by exposure the continuously repeated pattern, the repeated pattern complying with the run length limitation in the predetermined range; second recording means for recording, by exposure, the address mark, the special pattern having the repeated pattern adjacent to the violation pattern; and third recording means for recording the address data by exposure.
11. An apparatus according to claim 2 , wherein the recording means comprises: first recording means for recording by exposure the continuously repeated pattern, the repeated pattern satisfying a run length m , second recording means for recording, by exposure, the address mark, the special pattern having the repeated pattern adjacent to the violation pattern satisfying a run length n ( n>m, n rm ( r 1), r : natural number), 10 and third recording means for recording the address data by exposure.
12. An apparatus according to claim 3 , wherein each of the header 1 field, the header 2 field, the header 3 field and the header 4 field comprises: a first field in which the continuously repeated pattern is recorded, the repeated pattern complying with the run length limitation in the predetermined range; a second field in which the address mark is recorded, the address mark including the violation pattern different from a reproduced pattern obtained by reproducing the repeated pattern when a defective pit which cannot be recognized as a pit is included in pits representing the repeated pattern; and a third field in which the address data is recorded, wherein the address mark detection means includes detection means for detecting the address mark from each of the header 1 field, header 2 field, header 3 field and header 4 field, which includes the first, second and third fields.
13. An apparatus according to claim 3 , wherein each of the header 1 field, the header 2 field, the header 3 field and the header 4 field comprises: a first field in which the continuously repeated pattern is recorded, the repeated pattern satisfying a run length m ; a second field in which the address mark is recorded, the address mark comprising the violation pattern satisfying a run length n ( n>m, n rm ( r 1), r : natural number), and a third field in which the address data is recorded, wherein the address mark detection means includes detection means for detecting the address mark from each of the header 1 field, header 2 field, header 3 field and header 4 field, which includes the first, second and third fields.
14. An apparatus according to claim 3 , wherein each of the header 1 field, the header 2 field, the header 3 field and the header 4 field comprises: a first field in which the continuously repeated pattern is recorded, the repeated pattern complying with the run length limitation in the predetermined range; a second field in which the address mark is recorded, the special pattern having the repeated pattern adjacent to the violation pattern; and a third field in which the address data is recorded, wherein the address mark detection means includes detection means for detecting the address mark from each of the header 1 field, header 2 field, header 3 field and header 4 field, which includes the first, second and third fields.
15. An apparatus according to claim 3 , wherein each of the header 1 field, the header 2 field, the header 3 field and the header 4 field comprises: a first field in which the continuously repeated pattern is recorded, the repeated pattern satisfying a run length m , a second field in which the address mark is recorded, the special pattern having the repeated pattern adjacent to the violation pattern satisfying a run length n ( n>m, n rm ( r 1), r : natural number); and a third field in which the address data is recorded, wherein the address mark detection means includes detection means for detecting the address mark from each of the header 1 field, header 2 field, header 3 field and header 4 field, which includes the first, second and third fields.
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September 10, 2002
July 29, 2003
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